Los Angeles -LRB- CNN -RRB- -- It 's a boy !

Jessica Simpson gave birth to little Ace Knute Johnson via a scheduled C-section Sunday in Los Angeles , her rep told CNN .

It 's the second child for the 32-year-old singer/TV personality and her fiance , former NFL player Eric Johnson . Ace has a big sister , 1-year-old Maxwell Drew .

The `` Fashion Star '' mentor accidentally revealed that she and Johnson were expecting a boy on `` Jimmy Kimmel Live '' in March .

`` It 's a total different pregnancy . I just feel awful ... I 've been vomiting , '' Simpson told Kimmel . `` The crazy thing is , I never knew a wiener could actually make me nauseous . ''

After realizing what she said , Simpson clarified , `` Well , I guess I just told the world I 'm having a boy . ''

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Jessica Simpson gives birth via scheduled C-section

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Ace Knute Johnson is the second child for the singer/TV personality

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She accidentally revealed his gender on `` Jimmy Kimmel Live '' in March